高中英语选修六unit4Warmingupandreading

高中英语选修六unit4Warmingupandreading第1页/共36页Extremeheat酷暑第2页/共36页

Canyouthinkofsomenaturaldisasters(自然灾害)becauseoftheextremeheat?第3页/共36页drought(旱灾)第4页/共36页fire第5页/共36页flood第6页/共36页hurricane/typhoon第7页/共36页Ifeelhot!第8页/共36页.×√Low-carbonlife（低碳生活）第9页/共36页TheEarthisBecomingWarmer--ButDoesItMatter?地球在变暖——要不要紧？Reading第10页/共36页NewWordsandexpressionstemperature温度onedegreeFahrenheit华氏一度explore探索humanactivities人类活动phenomenon现象subscribeto同意，赞成fossilfuels矿物燃料byproduct副产品“greenhouse”gases温室气体atmosphere大气methane甲烷，沼气degreeCelsius摄氏度quantitiesof大量的accuratemeasurements精确的测量data资料，数据catastrophe大灾难beopposedto反对environmentalconsequences环境影响agreatrangeof大量的evenif即使keepon继续第11页/共36页

ScanningWho

：_____________Threescientists:____________________________

SophieArmstrongDrJaniceFoster;CharlesKeeling;GeorgeHambley;第12页/共36页Whatarethetwographsabout?Graph1showsthetemperaturedifference(温度差异)from1860to2000.Graph2showsthecarbondioxidecontent(二氧化碳含量)intheatmospherefrom1957to1997.Graph1:Graph2:第13页/共36页CarefulReading第14页/共36页Paragraph1Paragraphs2&5Paragraph6Part1Part2Part4MainideaofthetextPart3Paragraph7Howglobalwarmingcomesabout?(全球变暖是怎样产生的)Twodifferentopinionsaboutglobalwarming.Theearthisbecomingwarmer.Shouldwedoanything?第15页/共36页Duringthe20thcentury,thetemperatureoftheearthdidn’tseemtoincreasemuch.2.Thereisnodoubtthatglobalwarmingiscausedbythehumanactivities.3.Notallscientistsbelievethattheincreaseintheearth’stemperatureisduetotheburningoffossilfuels.Trueorfalse

第16页/共36页4.Thelevelsofcarbondioxidehaveincreasedgreatlyoverthelast100—150years.5.GeorgeHambleybelievesthatglobalwarmingwilldogoodtotheearth.6.Weknowtheeffectsofglobalwarming.第17页/共36页Howhasglobalwarmingcomeabout(产生)?1.Humanactivity

Theproblembeginswhenhugequantitiesofextracarbondioxide(大量的二氧化碳)areaddedintotheatmosphere.…isduetotheburningoffossilfuels…2.

GreenhousegasesParagraph2&3第18页/共36页carbondioxideFossilFuel(矿物燃料)coaloilgasglobalwarming●●●●●●produce二氧化碳第19页/共36页Haveyoueverseenagreenhouse?第20页/共36页Methane['mi:θein]

WhatareGreenhousegases?Therearegasescalled“greenhousegases”,including…CarbondioxideWatervaporTheytraptheheatfromthesunandwarmtheearth.第21页/共36页Dr.Foster:_____________________GeorgeHambley:_________________Whatdothescientiststhinkaboutglobalwarming?Dotheyagreewithoneanother?Itwouldbeacatastrophe.weshouldnotworryaboutit.Theyhavequitedifferentattitudestowardsthisissue.Paragraph6第22页/共36页Doesglobalwarmingmatter?Positiveeffects（正面影响）

Negativeeffects(负面影响）第23页/共36页causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffects第24页/共36页tsunamiThesealeveltorise.第25页/共36页第26页/共36页tornados第27页/共36页Severestormsdroughtsfaminesthespreadofdiseases第28页/共36页destructionofspecies第29页/共36页causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectsmakeplantsgrowquickercropswillproducemoreagreaterrangeofanimalsmakelifebetter第30页/共36页Summary

HowEffects

第31页/共36页1.Humanactivities2.GreenhousegasesCarbondioxide第32页/共36页causethesealeveltoriseseverestormsfloodsdroughtsfaminesthespreadofdiseasesdisappearanceofspeciesPositiveeffectsNegativeeffectsmakeplantsgrowquickercropswillproducemoreagreaterrangeofanimalsma